smokeloader | 3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
09-03-2023 02:24

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General

Target

3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
Size

212KB
MD5

776334c0e8b22c29f2d22b5f11b0af77
SHA1

e6565024701a3768a6d3bedfc48fa8d5b3d6c0dd
SHA256

3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2
SHA512

8ee51e32f131a35f0dfaed2b2a62f05721e08a057316bbca21df0529eec8ba1066c2c1da0a52f13cdf61da1c6979998e3c866efb0f531506d0767bc9c37ed490
SSDEEP

3072:mZXkaon+lS7IhK6HBF+UeoVanoANOF8Z5KNXAbQmi:2o+lSfPDoANY8ZW8QN

Score

10^/10

smokeloader backdoor persistence trojan

Malware Config

Extracted

Family

smokeloader

Version

2022

http://hoh0aeghwugh2gie.com/

http://hie7doodohpae4na.com/

http://aek0aicifaloh1yo.com/

http://yic0oosaeiy7ahng.com/

http://wa5zu7sekai8xeih.com/

rc4.i32

Signatures

Detects Smokeloader packer 1 IoCs

resource	yara_rule
behavioral1/memory/1100-134-0x00000000006F0000-0x00000000006F9000-memory.dmp	family_smokeloader

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3624	F3CB.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce	F3CB.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	F3CB.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1100	3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
1100	3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3172	Process not Found

Suspicious behavior: MapViewOfSection 19 IoCs

pid	Process
1100	3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found
3172	Process not Found

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found
Token: SeShutdownPrivilege	3172	Process not Found
Token: SeCreatePagefilePrivilege	3172	Process not Found

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 3624	3172	Process not Found	91
PID 3172 wrote to memory of 3624	3172	Process not Found	91
PID 3624 wrote to memory of 4996	3624	F3CB.exe	92
PID 3624 wrote to memory of 4996	3624	F3CB.exe	92
PID 4996 wrote to memory of 2372	4996	cmd.exe	94
PID 4996 wrote to memory of 2372	4996	cmd.exe	94
PID 3172 wrote to memory of 3216	3172	Process not Found	96
PID 3172 wrote to memory of 3216	3172	Process not Found	96
PID 3172 wrote to memory of 3216	3172	Process not Found	96
PID 3172 wrote to memory of 3216	3172	Process not Found	96
PID 3172 wrote to memory of 792	3172	Process not Found	97
PID 3172 wrote to memory of 792	3172	Process not Found	97
PID 3172 wrote to memory of 792	3172	Process not Found	97
PID 3172 wrote to memory of 3388	3172	Process not Found	98
PID 3172 wrote to memory of 3388	3172	Process not Found	98
PID 3172 wrote to memory of 3388	3172	Process not Found	98
PID 3172 wrote to memory of 3388	3172	Process not Found	98
PID 3172 wrote to memory of 2348	3172	Process not Found	99
PID 3172 wrote to memory of 2348	3172	Process not Found	99
PID 3172 wrote to memory of 2348	3172	Process not Found	99
PID 3172 wrote to memory of 4728	3172	Process not Found	100
PID 3172 wrote to memory of 4728	3172	Process not Found	100
PID 3172 wrote to memory of 4728	3172	Process not Found	100
PID 3172 wrote to memory of 4728	3172	Process not Found	100
PID 3172 wrote to memory of 468	3172	Process not Found	101
PID 3172 wrote to memory of 468	3172	Process not Found	101
PID 3172 wrote to memory of 468	3172	Process not Found	101
PID 3172 wrote to memory of 468	3172	Process not Found	101
PID 3172 wrote to memory of 2088	3172	Process not Found	102
PID 3172 wrote to memory of 2088	3172	Process not Found	102
PID 3172 wrote to memory of 2088	3172	Process not Found	102
PID 3172 wrote to memory of 2088	3172	Process not Found	102
PID 3172 wrote to memory of 2360	3172	Process not Found	103
PID 3172 wrote to memory of 2360	3172	Process not Found	103
PID 3172 wrote to memory of 2360	3172	Process not Found	103
PID 3172 wrote to memory of 3400	3172	Process not Found	104
PID 3172 wrote to memory of 3400	3172	Process not Found	104
PID 3172 wrote to memory of 3400	3172	Process not Found	104
PID 3172 wrote to memory of 3400	3172	Process not Found	104

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe
"C:\Users\Admin\AppData\Local\Temp\3afc93a38d805b014502c8aab7c12945e3469b63a79e2bfea7101cc011b578b2.exe"
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1100

C:\Users\Admin\AppData\Local\Temp\F3CB.exe
C:\Users\Admin\AppData\Local\Temp\F3CB.exe
1⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3624
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c new.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4996
- - C:\Windows\system32\reg.exe
    REG ADD "HKLM\SOFTWARE\Policies\Google\Chrome" /v "CloudManagementEnrollmentToken" /t REG_SZ /d "d9bd6e4b-f7a3-4829-95e0-2c9bcf248048"
    3⤵
    PID:2372

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:3216

C:\Windows\explorer.exe
C:\Windows\explorer.exe
1⤵
PID:792

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:3388

C:\Windows\explorer.exe
C:\Windows\explorer.exe
1⤵
PID:2348

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:4728

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:468

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:2088

C:\Windows\explorer.exe
C:\Windows\explorer.exe
1⤵
PID:2360

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
1⤵
PID:3400

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\F3CB.exe

Filesize
151KB

MD5
b55feac472065f71921d6affc61df584

SHA1
46ec50413f2bc38fed1d6b69828208a673d2c818

SHA256
9a5ac58d9bdbe96a1bd2acd639d73fa943c2b5494eb09f4a3635e052c35e8030

SHA512
e3ad559d55f40914239946b49ed6a39ee74c6264e040714f9997324ffb3ee7937f679e62ba756945e333e0cd9774151b8cbfd71286fbf1e604a68caf4b1affa6

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\new.bat

Filesize
145B

MD5
efb41657387918c43a63deb685e2ab1d

SHA1
ef597efb37a86e33c0177f85c0c41049c128513b

SHA256
0776816e36fe9897fb0e9d916283e6a6996f0f8fb21a6b680e92e1121dbc9746

SHA512
e51469fffa92463f88e0c605bfc8a13986846bf004fe93e38a9b5a7e94982939514f8bbd48a02d86affe06f8e660b6835ede4064efb652b41f926f189bc0427b

Download Submit
memory/468-169-0x0000000000CE0000-0x0000000000CE9000-memory.dmp

Filesize
36KB

Download
memory/468-170-0x0000000000D00000-0x0000000000D27000-memory.dmp

Filesize
156KB

Download
memory/468-171-0x0000000000CE0000-0x0000000000CE9000-memory.dmp

Filesize
36KB

Download
memory/468-183-0x0000000000D00000-0x0000000000D27000-memory.dmp

Filesize
156KB

Download
memory/792-157-0x00000000003F0000-0x00000000003FF000-memory.dmp

Filesize
60KB

Download
memory/792-181-0x0000000000470000-0x000000000047B000-memory.dmp

Filesize
44KB

Download
memory/792-158-0x0000000000470000-0x000000000047B000-memory.dmp

Filesize
44KB

Download
memory/792-159-0x00000000003F0000-0x00000000003FF000-memory.dmp

Filesize
60KB

Download
memory/1100-134-0x00000000006F0000-0x00000000006F9000-memory.dmp

Filesize
36KB

Download
memory/1100-137-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2088-174-0x0000000000310000-0x000000000031B000-memory.dmp

Filesize
44KB

Download
memory/2088-173-0x0000000000CE0000-0x0000000000CE9000-memory.dmp

Filesize
36KB

Download
memory/2088-172-0x0000000000310000-0x000000000031B000-memory.dmp

Filesize
44KB

Download
memory/2088-184-0x0000000000CE0000-0x0000000000CE9000-memory.dmp

Filesize
36KB

Download
memory/2348-163-0x00000000005E0000-0x00000000005EC000-memory.dmp

Filesize
48KB

Download
memory/2348-164-0x0000000000CB0000-0x0000000000CB9000-memory.dmp

Filesize
36KB

Download
memory/2348-165-0x00000000005E0000-0x00000000005EC000-memory.dmp

Filesize
48KB

Download
memory/2360-176-0x0000000000310000-0x000000000031B000-memory.dmp

Filesize
44KB

Download
memory/2360-175-0x0000000000C20000-0x0000000000C2D000-memory.dmp

Filesize
52KB

Download
memory/2360-185-0x0000000000310000-0x000000000031B000-memory.dmp

Filesize
44KB

Download
memory/2360-177-0x0000000000C20000-0x0000000000C2D000-memory.dmp

Filesize
52KB

Download
memory/3172-135-0x0000000002C00000-0x0000000002C16000-memory.dmp

Filesize
88KB

Download
memory/3216-155-0x00000000006F0000-0x00000000006F9000-memory.dmp

Filesize
36KB

Download
memory/3216-156-0x0000000000470000-0x000000000047B000-memory.dmp

Filesize
44KB

Download
memory/3216-154-0x0000000000470000-0x000000000047B000-memory.dmp

Filesize
44KB

Download
memory/3388-162-0x0000000000CB0000-0x0000000000CB9000-memory.dmp

Filesize
36KB

Download
memory/3388-160-0x0000000000CB0000-0x0000000000CB9000-memory.dmp

Filesize
36KB

Download
memory/3388-182-0x00000000003F0000-0x00000000003FF000-memory.dmp

Filesize
60KB

Download
memory/3388-161-0x00000000003F0000-0x00000000003FF000-memory.dmp

Filesize
60KB

Download
memory/3400-178-0x0000000000E30000-0x0000000000E3B000-memory.dmp

Filesize
44KB

Download
memory/3400-179-0x0000000000C20000-0x0000000000C2D000-memory.dmp

Filesize
52KB

Download
memory/3400-180-0x0000000000E30000-0x0000000000E3B000-memory.dmp

Filesize
44KB

Download
memory/3400-186-0x0000000000C20000-0x0000000000C2D000-memory.dmp

Filesize
52KB

Download
memory/4728-168-0x0000000000D00000-0x0000000000D27000-memory.dmp

Filesize
156KB

Download
memory/4728-166-0x0000000000D00000-0x0000000000D27000-memory.dmp

Filesize
156KB

Download
memory/4728-167-0x00000000005E0000-0x00000000005EC000-memory.dmp

Filesize
48KB

Download